Grinding or reducing apparatus.



E. BARTHELMESS.

GRINDING 0R REDUCING APPARATUS.

APPLICATION FILED AUG. 16, 1911. 1,068,096. Patented July 22, 1913.

3 SHEETS$HBET 1.

E. BARTHELMESS.

GRINDING OR REDUCING APPARATUS.

APPLICATION FILED AUG.16, 1911.

mswga, Patented July 22, 1913.

3 SHEETSSHEET 2.

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EMIL BARTHELMESS, OF NEUSS, GERMANY.

GRINDING OB REDUCING APPARATUS.

Specification of Letters Patent.

Patented J nly 22, 1913.

Application filed August 16, 1911. Serial No. 644,310.

To all to/mm it may come/a Be it known that l', than; Banrri-irmnrss, asubject of the tierman Emperor, and residing at Neuss, lthenish Prussia,in the German Empire, have invented certain new and useful improvementsin Grinding or Reducing Apparatus, of which the following is aspecification.

My invention relates to imprm eme1'1ts in grinding or reducingapparatus, and more particularly to grinding apparatus of that class inwhich the material to be reduced is crushed between a revolving reducingring and one or more reducing rollers.

The reason for the rapid wear of the bearings of the reducing rollersresides in the fact, that the material passed between the reducingroller and ring tends to force the reducing roller in variousdirections. While for this reason a certain resiliency away from thereducing ring has been in'iparted to the rollers by supporting theirbearings on springs, l have found, that such resiliency is not by anymeans sullicient. hilore particularly I have found, that the roller hasthe tendency to oscillate with its longitudinal axis about its center,which oscillations are not possible in the machines now in use.

An important feature of my invention consists in so mounting the rollerthat it can freely oscillate, and for this purpose the bearings providedat both sides of the roller instead of being guided between rigid guideways or on rigid rocking lovers are mounted exclusively on yieldingmembers such as springs. I11 the preferred form of the invention a setof springs are provided at each side of the roller, and the said springsare arranged at an angle to each other, so that the resultant of theforces exerted thereby holds the roller in engagement with the surfaceof the reducing rings. As the roller is thus held by a plurality ofyielding memhere or springs, rigid supports or guiding means are notrequired, so that the bearings are not subject to wear. Urdinarily aplurality of reducing rollers is provided in a machine of this class,and in such cases I prefer to mount both rollers at both sides on asystem of springs which consists of a spring connecting the bearings ofboth rollers and two springs one for each of the rollers which arearranged at an angle to the said connecting sprin My invention alsorelates to means for regulating the pressure exerted by the springs onthe rollers. And in this respect my invention consists in providingindependent regulating means for the springs located. at opposite sidesof the rollers, and in addition means for simultaneously regulating thetension of the systems of springs located at opposite sides of therollers.

In order that my invention be more clearly understood a machineembodying the same has been shown in the accompanying drawings, in whichthe same letters of reference have been used in all the views toindicate corresponding parts.

In said drawin 's-Figure l, is a side view of the machine, Fig. 2 is aview of the machine seen from the right of Fig. 1, with the belt pulleyin section, parts being broken away, and Fig. 3 is a top plan view ofFig. l partly in section.

Referring to the machine illustrated in the drawiiws, the machinecomprises a drum or casing (it of substantially cylindrical form whichis mounted on a foundation or other suitable support. At its top thecasing is closed in a dust proof manner by means of a hood B, and at itslower end it is equipped with a hopper T. The casing G is equipped witha chamber S for supplying thereto the material to be ground, and thesaid chamber is formed with two branches connecting respectively toopposite sides of the casing. At both sides of the casing stationarybean ings L L are located which are made in two sections, the lower oneof which forms a part of the casing G. In the said bearings a shaft Amounted which carries a driving roller W and a belt pulley ll. Theroller is in driving engagement with a crushing or reducing ring M whichis mounted for revolution within the casing G and is spaced from thewalls of the latter by means of rings Y located at both sides of thecasing. Inside the crushing ring two crushing rollers W and W arelocated which are respectively keyed to shafts A and A supported insuitable bearings L and If. The latter are resiliently supported bycoiled springs F F and F for which purpose they are formed with lugs V Vand V, V". As shown the spring F is located between the bearings L and Land. the spring F bears on a lug X of the casing G by means of a rod 26'provided at its upper end with a head and a washer U. Pit its lower endthe rod passes through a bore of the lug X and it is held in place bymeans of nuts K. Through the coiled spring F there extends a rod Z whichat its upper end is provided with a head and a washer U and at its lowerend is jointed to an arm (Z of a bell crank lever 71 pivotally mountedon the casing G at The second arm of the said bell crank lever isengaged by a cam c which is keyed to a shaft '10 mounted in a suitablesleeve H cast integral with the casing G. At the opposite side of thecasing a similar system of springs is provided which are in the same wayconnected to a cam e keyed to the shaft 10. The shaft to can be rotatedby means of a worm gearing g and a hand wheel L, and .when thus rotatingthe shaft the tension of the springs located at opposite sides of thecasing G is simultaneously adjusted. The system of springs located atopposite sides of the casing can be independently adjusted by means ofthe nuts K.

As shown in the drawings, the crushing ring is formed with a concaveinner surface, and the rollers are formed with correspond ing convexsurfaces.

The material to be pulverized is supplied to the crushing apparatus atopposite sides of the casing G through the chamber which has twobranches E. Within the chamber S a funnel t is located which is formedwith two outlet conduits one for each of the branches E. Below the saidconduits two chutes 1', a" are located which are pivotally mountedwithin the chamber S at T At their inner ends the said chutes areengaged by the head a of a setting screw 8 projecting downward throughthe wall of the chamber S. By means of a hand wheel is the said screwcan be vertically adjusted, and by such adjustment the chutes r are setin a more or less inclined position, so as to admit a larger or lessamount of the material to be ground to the crushing ring. From thechamber S the material flows downward to the crushing apparatus throughthe branches E provided at opposite sides of the case G.

To permit the rollers to be easily removed from or put into the machinethe casing G is provided with four openings the size of whichcorresponds to the diameter of the rollers and which are normally closedby covers D and D.

I claim herein as my invention:

1. In an apparatus of the class described, the combination with areducing ring, and means to rotate the same, of a plurality of reducingrollers, means to hold said rollers in contact with the ring, said meanscomprising a spring provided between adjacent reducing rollers andconnecting the same with each other and springs respectively connectedto said rollers and arranged at an angle to said spring connectingadjacent rollers with each other.

2. in an apparatus of the class described, the combination with areducing ring, a driving roller engaging said ring, fixed bearings forsaid driving roller, and means to rotate said driving roller, of aplurality of reducing rollers, means to hold said rollers in contactwith the ring, said holding means comprising a yielding member providedbetween adjacent reducing rollers and connecting the same with eachother and yielding members respectively connected to said rollers andarranged at an angle to said member connecting adjacent rollers witheach other.

3. In an apparatus of the class described, the combination with areducing ring, a driving roller engaging said ring, fixed bearings forsaid driving roller, and means to rotate said driving roller, of aplurality of reducing rollers, means to hold said rollers in contactwith the ring, said holding means comprising a spring provided betweenadjacent reducing rollers and connecting the same with each other andsprings respectively connected to said rollers and arranged at an angleto said spring connecting adj acent rollers with each other.

4. In an apparatus of the class described, the combination with areducing ring, a driving roller engaging said ring, fixed bearings forsaid driving roller, and means to rotate said driving roller, of tworeducing rollers, means to hold said rollers in contact with the ring,said holding means comprising a spring connecting said rollers with eachother and two springs respectively connected to said rollers andarranged at an angle to said spring connecting the rollers with eachother.

5. In an apparatus of the class described, the combination with areducing rin and means to rotate the same, of at least one reducingroller, and means provided at each side of the roller and independent ofeach other to hold the roller in engagement with the ring, said meanscomprisingat each side of the roller a plurality of springs arranged atan angle to each other, and means inde pendent of each other to adjustthe force exerted by one of said springs provided at opposite sides ofthe reducing roller.

6. In an apparatus of the class described, the combination with areducing ring, and means to rotate the same, of at least one reducingroller, and means provided at each side of the roller and independent ofeach other to hold the roller in engagement with the ring, said meanscomprising at each side of the roller a plurality of yielding membersarranged at an angle to each other, and means common to both holdingmeans provided at each side ofthe reducing roller to adjust the forceexerted by said yielding members on each side of the roller on thereducing roller.

7. In an apparatus of the class described, the combination with areducing ring, and means to rotate the same, of at least one reducingroller, and means provided at each side of the roller and independent ofeach other to hold the roller in engagement with the ring, said meanscomprising at each side of the roller a plurality of springs arranged atan angle to each other, and means conimon to both holding means providedat each side of the reducing roller to simultaneously adjust the tensionoi said springs at each side of the reducing roller.

8. In an apparatus of the class described, the combination with areducing ring, and means to rotate the same, of two reducing rollers,means provided at each side of said reducing rollers to hold thereducing rollers in contact with the ring, said means comprising at eachside of the rollers a spring connecting said rollers with each other andtwo springs respectively connected to said rollers and to a relativelyfixed part and arranged at an angle to the spring connecting the rollerswith each other, and means common to both holding means provided at eachside of the reducing rollers to simultaneously adjust the tension ofsaid springs at each side of the reducing rollers.

9. In an apparatus of the class described, the combination with areducing ring, a driving roller engaging said ring, and means to rotatesaid driving roller, of at least one reducing roller, and means providedat each side of the roller and independent. of each other to hold theroller in engagement with the ring, said means comprising at each sideof the roller a plurality of springs arranged at an angle to each other,and means common to both holding means provided. at each side of thereducing roller to sinniltaneously adjust the tension of said springs ateach side of the reducing roller.

10. In an apparatus of the class described, the combination with areducing ring, a driving roller engaging said ring, and means to rotatesaid driving roller, of two reducing rollers, means provided at eachside of said reducing rollers to hold the reducing rollers in contactwith the ring, said means comprising at each side of the rollers aspring connecting said rollers with each other and two springsrespectively connected to said rollers and to a relatively fixed partand arranged at an angle to the spring connecting the rollers with eachother, and means common to both holding means provided at each side ofthe reducing rollers to simultanconsly adjust the tension of saidsprings at each side of the reducing rollers.

In testimony whereof I affix my signature in presence of two witnesses.

EMIL BARTHELMESS. [Ls] lVitnesses CHAS. J. men'r,

L. Norma.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

